Title :
Superconducting detectors for terahertz imaging
Author :
S. L. Jiang;X. Q. Jia;B. B. Jin;L. Kang;W. W. Xu;J. Chen;P. H. Wu
Author_Institution :
Research Institute of Superconductor Electronics, Nanjing University, Nanjing 210093
Abstract :
Superconducting niobium nitride (NbN) hot electron bolometer (HEB) detectors consist of a complementary logarithmic-spiral antenna made of gold and an NbN film (bridge) connecting across the antenna´s inner terminals have been fabricated and characterized. For its performance as a heterodyne mixer, the system DSB noise temperature of about 500 K and the intermediate frequency (IF) gain bandwidth (GBW) of about 4 GHz have been obtained at 4.2 K and 0.65 THz. For its performance as a direct detector, a microwave-driven scheme has been tried.
Keywords :
"Detectors","Films","Temperature measurement","Mixers","Microwave measurement","Superconducting microwave devices","Bolometers"
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on
Electronic_ISBN :
2162-2035
DOI :
10.1109/IRMMW-THz.2015.7327514
